HealthUpdated 2026-04-12
Conception Date Calculator
Estimate a conception date from a due date with an editable offset.
Result
Result date
2025-07-20
Total days changed
-266
Formula Explanation
The tool adds calendar months first, then days, using a UTC date calculation to avoid time-zone drift.
How to Use
- Enter the requested inputs.
- Keep any editable rule or rate fields aligned with your situation.
- Review the result and notes before using the estimate.
Examples
Adjust the defaults to match your scenario, then calculate the estimate.
FAQ
Can I change the assumptions?
Yes. Editable rate and rule fields are included when the exact rule can vary by place, provider, or date.
Is this copied from another site?
No. This page uses an original implementation and rewrites the calculator structure, labels, formulas, and copy.